From 1a016646d5621d8c951ca52bbdba36a962acb01c Mon Sep 17 00:00:00 2001
From: jackschu <js9pa@virginia.edu>
Date: Mon, 1 Jul 2024 01:06:45 -0400
Subject: [PATCH] automatic semicolon should be inserted for '1\n.2'

---
 src/scanner.c            | 6 +++++-
 test/corpus/literals.txt | 2 ++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/scanner.c b/src/scanner.c
index d429fcba..79aaeb91 100644
--- a/src/scanner.c
+++ b/src/scanner.c
@@ -131,7 +131,6 @@ static bool scan_automatic_semicolon(TSLexer *lexer, bool comment_condition, boo
 
     switch (lexer->lookahead) {
         case ',':
-        case '.':
         case ':':
         case ';':
         case '*':
@@ -148,6 +147,11 @@ static bool scan_automatic_semicolon(TSLexer *lexer, bool comment_condition, boo
         case '/':
             return false;
 
+        // Insert a semicolon before decimals literals but not otherwise.
+        case '.':
+            skip(lexer);
+            return iswdigit(lexer->lookahead);
+
         // Insert a semicolon before `--` and `++`, but not before binary `+` or `-`.
         case '+':
             skip(lexer);
diff --git a/test/corpus/literals.txt b/test/corpus/literals.txt
index b5a54456..4a617652 100644
--- a/test/corpus/literals.txt
+++ b/test/corpus/literals.txt
@@ -13,6 +13,7 @@ Numbers
 0b1_000_000
 1_2_3
 12_3.4_5e6_7
+.4_5e6_7
 0b1_000_000n
 01
 00000123
@@ -33,6 +34,7 @@ Numbers
   (expression_statement (number))
   (expression_statement (number))
   (expression_statement (number))
+  (expression_statement (number))
   (expression_statement (number)))
 
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